Malicious Code Injection in devoted_guanaco_z3n Package

devoted_guanaco_z3n Updated 27 Nov 2025

Summary

11/11/2025
CRITICAL
No i
Critical
Not published

MAL-2025-94015: Malicious code in devoted_guanaco_z3n (npm). Affected versions are not published. No fix is published. How to fix ↓

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Background

The devoted_guanaco_z3n package is part of the npm ecosystem and is associated with the tea.xyz token reward campaign. This package is designed to facilitate the automatic generation and publication of derivative packages, which can inflate developer reputation scores for token rewards. However, it has been identified as containing malicious code that compromises its integrity and the security of the npm registry.

Vulnerability Detail

The vulnerability in the devoted_guanaco_z3n package originates from its inclusion in a campaign that floods the npm registry with malicious packages. The malicious payload modifies the package.json file by removing private flags, altering version numbers, and generating random package names. This behavior leads to the continuous republishing of variants, which pollutes the npm registry and can potentially harm developers relying on legitimate packages.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall devoted_guanaco_z3n

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

Workaround

As a temporary measure, you can avoid using the devoted_guanaco_z3n package and look for alternative packages that provide similar functionality without the associated risks. Additionally, consider using tools like Vulert to monitor your project for vulnerabilities.

Conclusion

The devoted_guanaco_z3n package contains a significant vulnerability that can compromise the security of your project. It is crucial to remove this package and monitor your dependencies for any potential threats. Utilizing tools like Vulert can help ensure your application remains secure.

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FAQ

The devoted_guanaco_z3n package is an npm package that is part of a token reward campaign, designed to generate and publish derivative packages.

The vulnerability can lead to the pollution of the npm registry and may compromise the integrity of your project by introducing malicious code.

You should uninstall the devoted_guanaco_z3n package immediately and check for any dependencies that may be affected.

Yes, you can use Vulert to monitor your project for open-source vulnerabilities in real-time using just your package-lock.json file.

Yes, you can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without requiring any signup.

How To Fix

This package is malicious. Remove it and rotate any credentials it could have accessed.

npm uninstall devoted_guanaco_z3n

If it arrived as a transitive dependency, remove the package that pulled it in, then reinstall.

Tip — Not sure whether your app is affected? Vulert can check the versions your app actually runs. Scan free →

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